Description:
A vulnerability was reported in Apple iOS. A physically local user can bypass security restrictions and conduct brute force passcode guessing attacks against the target system.

A physically local user on a device that has been booted can send specially crafted data via a physically connected keyboard to bypass the failed passcode attempt limits. This can be exploited to conduct brute force password guessing attacks against the device.

The original advisory is available at:

https://twitter.com/hackerfantastic/status/1010240042990596096

A demonstration exploit video is available at:

https://vimeo.com/276506763

Matthew Hickey of Hacker House reported this vulnerability.

Impact:
A physically local user can conduct brute force passcode guessing attacks against the target system.